By the time Diego and John arrive, there is no sign of Anna. Though from your reports, this is her scene. At the periphery of the pre-race street party there are well built Latino men that fit the bill of underworld enforcer types. They are observing and seem to be making sure no one gets to out of hand while not partaking in the festivities.
When Diego gets out and take a good look around, trying to spot familiar faces, he doesn't see Annas, but he does notice two people that he has encountered recently. The first is a medium build really white skinned man with striking red hair and sideburns that follow his jawline to join up at his chin. Diego doesn't know the man's real name, but he was introduced to him as 'Dutch'. The smuggler that was to take his party to Singapore in return for a specific heart. Dutch is accompanied by a tall androgenous person in dark green leather jeans and a short black jacket. Their build is athletic, with slight feminine curves. Their black hair is short and boyish yet with some stylish bangs. Michelle was what Dutch called them, and they had acted as the smuggler's bodyguard in the past.
Dutch is mingling with some people at the starting line of cars while Michelle has the look of someone sizing up threats and gauging risk factors without making any effort to hide it.
It isn't long before Diego receives a text message from Aiden, indicating the car he is in.
OOC wrote:Diego's Perception check wasn't to notice Anna. It was to notice Dutch and Michelle. John hasn't met either of them, which is why I did not ask John to make the check.
As for Anna, by the time Diego and John arrive she is in a position that Perception checks won't help you find her unless you have some kind of Super-Sense with Tracking. If you have it, you may use Investigate to try to track her down or Spycraft to get information out of people. But that would take a considerable amount of time. She might notice your efforts and leave the area altogether.
Aiden is also driving a Camaro, not a Corvette. Camaros tend to be a bit of a blend of sports car and muscle car whereas the Corvette is a luxury sports car.